Research, development, and field trial of the universal Global Navigation Satellite System receivers

Global Navigation Satellite System (GNSS) can provide continuous, high precision, and absolute displacement information on landslides. It can thus be used in landslide monitoring applications. However, the cost of high-precision GNSS is too high for large-scale deployment. From an application perspective, we reviewed the status and challenges of applying GNSS technology to landslide monitoring. We then investigated the data specification for a landslide monitoring GNSS receiver to better meet specified engineering requirements. We further developed prototype universal GNSS monitoring devices and deployed them in the Heitai area for testing. Approximately two months of testing indicated that the prototype universal GNSS devices well meet the engineering requirements, and the tested GNSS data are in good agreement with the crack data. The hourly monitoring GNSS solution achieves sub-millimeter level accuracy and can be used for extracting landslide information.